Chair



FIG. 1 is a top, front, right perspective view of the claimed design for a chair;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines immediately adjacent to the shaded area depict boundaries of the claimed design and form no part thereof. The broken lines showing the remainder of the chair depict environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for a chair, as shown and described. 